Humans fuck shit up somehow, just not on the 21st, just another chance for the doomsayers to shout and act like idiots imo.

"Reminds me of a dog. You stare at it while it's playing outside, running around in a circle, then stopping up, wagging with a wide "grin", jumping around until you call for the dog. Then it lowers its tail because it think it's done something bad and then you throw the ball, seeing the tail go straight into the air in bliss! ^^" - Gehco

The Mayans will rise from the dead, and go around and kill everyone that falsely accused them of predicting them of the end of the world. Then head back to their graves in peace knowing their name has been cleared.